CN111736736A - Touch control assembly and touch control display device - Google Patents
Touch control assembly and touch control display device Download PDFInfo
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- CN111736736A CN111736736A CN202010677111.1A CN202010677111A CN111736736A CN 111736736 A CN111736736 A CN 111736736A CN 202010677111 A CN202010677111 A CN 202010677111A CN 111736736 A CN111736736 A CN 111736736A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0448—Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
Abstract
The application provides a touch-control subassembly and touch-control display device, the touch-control subassembly includes the touch-control layer, and the touch-control layer includes a plurality of touch-control units, and every touch-control unit includes: a first touch electrode disposed along a first direction, the first touch electrode comprising: the first branch electrode is arranged along a first direction, and one end of the first branch electrode is electrically connected with the first main electrode; a second touch electrode disposed along a second direction, the second touch electrode comprising: the second main electrode, at least one second branch electrode and at least one first connecting branch electrode are arranged along the second direction, one end of the second branch electrode is electrically connected with the second main electrode, two ends of the first connecting branch electrode are respectively electrically connected with the second branch electrode and the second main electrode, the second branch electrode surrounds the corresponding first branch electrode, and the first direction is different from the second direction.
Description
Technical Field
The present application relates to the field of touch technologies, and in particular, to a touch module and a touch display device.
Background
The capacitive touch screen is widely applied to various electronic interaction scene devices due to its high durability, long service life and the function of supporting multi-point touch. The capacitive touch screen detects the specific position touched by a finger by detecting the capacitance change at the position touched by the finger.
At present, the Touch electrode is usually made of a hollow Metal Mesh (Metal Mesh) material, and its conductive area is smaller than that of a conventional Touch electrode made of an Indium Tin Oxide (ITO) material, so that the mutual capacitance induction between the driving electrode TX and the sensing electrode RX of the Touch electrode is very small, and thus the capacitance variation caused by finger Touch is smaller and is not easily detected by a Touch chip (Touch IC).
Therefore, it is necessary to provide a technical solution to solve the problem of small mutual capacitance between the driving electrodes and the sensing electrodes of the touch electrodes.
Disclosure of Invention
An object of the present application is to provide a touch module and a touch display device, so as to improve mutual capacitance between a driving electrode and an inductor in each touch unit, and reduce impedance of one of the driving electrode or the inductor electrode in each touch unit, thereby improving touch reporting rate of the touch display device.
A touch assembly comprising a touch layer, the touch layer comprising a plurality of touch cells, each of the touch cells comprising:
a first touch electrode disposed along a first direction, the first touch electrode comprising: the first branch electrode is arranged along the first direction, and one end of the first branch electrode is electrically connected with the first trunk electrode;
a second touch electrode disposed along a second direction, the second touch electrode comprising: the second branch electrode is arranged along the second direction, one end of the second branch electrode is electrically connected with the second main electrode, two ends of the first branch electrode are respectively electrically connected with the second branch electrode and the second main electrode, the second branch electrode surrounds the corresponding first branch electrode, and the first direction is different from the second direction.
In the touch module, a first hollow portion is disposed in a first region surrounded by the first connecting branch electrode, the second main electrode, and the second branch electrode, and a first dummy electrode is disposed in the first hollow portion.
In the above touch assembly, the second touch electrode further includes: and one end of each second connection branch electrode is electrically connected with the corresponding second branch electrode, and the other end of each second connection branch electrode is electrically connected with one end of the corresponding second connection branch electrode in the touch unit adjacent to the touch unit along the second direction.
In the touch control assembly, a second hollow part is arranged in a second area surrounded by corresponding second connecting branch electrodes and second branch electrodes in two adjacent touch control units along a second direction, and a second virtual electrode is arranged in the second hollow part.
In the touch module, the second branch electrode is far away from the end of the second branch electrode connected to the second main electrode, and is electrically connected to one end of the corresponding second branch electrode in the touch unit adjacent to the second branch electrode along the second direction.
In the touch module, a third hollow portion is disposed in a third area surrounded by the first connecting branch electrode, the second main electrode, and the second branch electrode, and a third virtual electrode is disposed in the third hollow portion.
In the touch control assembly, a fourth hollow part is arranged in a fourth area surrounded by the corresponding second branch electrode and the first main electrode in two adjacent touch control units along the first direction, and a fourth virtual electrode is arranged in the fourth hollow part.
In the touch module, one end of the second branch electrode, which is far away from the second main electrode, is insulated from one end of an adjacent second branch electrode in the touch unit adjacent to the second branch electrode along the first direction.
In the above touch assembly, the first main electrode includes: a plurality of first widened portions and a first connection portion electrically connected to the first widened portions,
the first diverging electrode includes: a plurality of second widened portions and a second connection portion electrically connected to the second widened portions,
the second branch electrode surrounds the corresponding second widened portion and the second connection portion.
In the touch assembly, a width of the first widened portion of the first branch electrode extending from a portion of the first main electrode close to the first main electrode is smaller than a width of the first widened portion of the first branch electrode extending from a portion of the first main electrode far from the first main electrode.
In the touch device, the first connecting branch electrode is disposed corresponding to the second widened portion of the first branch electrode adjacent to the first connecting branch electrode.
In the touch control assembly, one end of the first branch electrode is electrically connected with the intersection of the first main electrode and the second main electrode, and an included angle α between the first branch electrode and the first main electrode satisfies 0 ° < α <90 °;
one end of the second branch electrode is electrically connected with the intersection of the second main electrode and the first main electrode, and an included angle beta between the second branch electrode and the second main electrode meets the requirement of 0 degree < beta <90 degrees.
In the above touch control assembly, the first direction is perpendicular to the second direction, an included angle α between the first branch electrode and the first main electrode is 45 °, and an included angle β between the second branch electrode and the second main electrode is 45 °.
In the above touch assembly, the first touch electrode and the second touch electrode are mirror-symmetric with respect to the first main electrode and the second main electrode, respectively.
In the touch control assembly, the first trunk electrodes positioned at two sides of the intersection of the first trunk electrode and the second trunk electrode are connected through a third connecting part;
the second main electrodes positioned at two sides of the intersection of the first main electrode and the second main electrode are connected through a fourth connecting part;
the fourth connecting portion is two unconnected connecting bridges, and the third connecting portion is insulated from the fourth connecting portion.
A touch display device comprises the touch assembly and a display panel, wherein the touch assembly is located on one side of the display panel, the display panel comprises an organic light emitting diode array layer and an encapsulation layer, and the encapsulation layer is located between the organic light emitting diode array layer and the touch assembly.
Has the advantages that: the application provides a touch-control subassembly and touch-control display device, the touch-control subassembly includes the touch-control layer, and the touch-control layer includes a plurality of touch-control units, and every touch-control unit includes: a first touch electrode disposed along a first direction, the first touch electrode comprising: the first branch electrode is arranged along a first direction, and one end of the first branch electrode is electrically connected with the first main electrode; a second touch electrode disposed along a second direction, the second touch electrode comprising: the second main electrode, at least one second branch electrode and at least one first connecting branch electrode are arranged along the second direction, one end of the second branch electrode is electrically connected with the second main electrode, two ends of the first connecting branch electrode are respectively electrically connected with the second branch electrode and the second main electrode, the second branch electrode surrounds the corresponding first branch electrode, and the first direction is different from the second direction. The first connecting branch electrode is arranged between the second branch electrode and the second main electrode to increase a transmission channel of current in each touch unit in the second direction, so that the impedance of the second touch electrode in each touch unit is reduced, each second branch electrode surrounds one first branch electrode to increase the mutual capacitance between the first branch electrode and the second branch electrode, and the impedance of the second electrode of each touch unit is reduced to improve the mutual capacitance of each touch unit, so that the touch report rate of the touch display device is improved.
Drawings
FIG. 1 is a schematic view of a touch display device according to the present application;
FIG. 2 is a schematic diagram of a driving structure of a touch layer of the touch display device according to the present application;
FIG. 3 is a first schematic view of the touch unit shown in FIG. 2;
FIG. 4 is a schematic diagram of a plurality of touch units shown in FIG. 3 arranged in an array;
FIG. 5 is a schematic diagram of a first touch electrode of the touch unit shown in FIG. 3;
FIG. 6 is a schematic diagram of a second touch electrode of the touch unit shown in FIG. 3;
FIG. 7 is a second schematic diagram of the touch unit shown in FIG. 2;
FIG. 8A is a first schematic diagram of a metal grid surrounding a sub-pixel;
fig. 8B is a second schematic diagram of a metal grid surrounding a sub-pixel.
The drawings are numbered as follows:
10 a substrate; 20 thin film transistor array layers; 30 an organic light emitting diode array layer; 40 an encapsulation layer; 50 a touch layer; 60 a polarizer; 70 a protective cover plate; 501 a first touch electrode; 5011 a first trunk electrode; 50111 a first widening; 50112 a first connection; 5012 a first branch electrode; 50121 second widening; 50122 a second connection; 5013 a third connection; 502a second touch electrode; 502a first hollowed-out portion; 502b a second hollowed-out portion; 502c a third hollowed-out portion; 502d fourth hollowed-out portion; 5021 a second main electrode; 5022 a second branch electrode; 5023 a first connection branch electrode; 5024 a second connection branch electrode; 5025 a fourth connecting part; 503 first lead line; 504 a second lead; 505 a touch-control unit; 5061 a first dummy electrode; 5062 a second dummy electrode; 5063 a third dummy electrode; 5064 a fourth dummy electrode.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Please refer to fig. 1, which is a schematic diagram of a touch display device according to the present application. The touch display device can be a flexible foldable touch display device and can also be a hard touch display device. The touch display device comprises a touch component and a display panel. The touch control component can be positioned on one side of the display panel to form an external touch control display device. The touch control component can be positioned in the display panel to form an embedded touch control display device. The display panel may be a liquid crystal display panel or an organic light emitting diode display panel. The present application is described below by taking the display panel as an organic light emitting diode display panel as an example.
The touch display device 100 includes a display panel, a touch device, a polarizer 60, and a protective cover 70 stacked in sequence. The display panel includes a substrate 10, a thin film transistor array layer 20, an organic light emitting diode array layer 30, and an encapsulation layer 40, which are sequentially stacked. The touch assembly includes a touch layer 50. The encapsulation layer 40 is located between the organic light emitting diode array layer 30 and the touch assembly.
The substrate 10 is a flexible substrate, and the substrate 10 serves as a carrier to provide a supporting surface for the thin film transistor array layer 20 and other films. The substrate 10 may be a glass substrate or the like.
The thin film transistor array layer 20 includes a plurality of thin film transistors arranged in an array. The thin film transistor is used to control the operation state of the organic light emitting diode in the organic light emitting diode array layer 30. The thin film transistor may be at least one of an amorphous silicon thin film transistor, a polycrystalline silicon thin film transistor, or a metal oxide thin film transistor.
The organic light emitting diode array layer 30 includes a plurality of organic light emitting diodes arranged in an array. The plurality of organic light emitting diodes arranged in an array comprise a plurality of independent anodes, an organic light emitting unit corresponding to each anode and a common cathode. The plurality of organic light emitting diodes arranged in an array form a plurality of sub-pixels of the organic light emitting diode display panel, and one organic light emitting diode corresponds to one sub-pixel. The plurality of sub-pixels includes a red sub-pixel R, a blue sub-pixel B, and a green sub-pixel G. The shape of the sub-pixels may be square, rectangular, diamond, or the like. The shape of the sub-pixel may be an ellipse or a quadrilateral with inwardly concave arcs at the edges. The size of the sub-pixels is several tens of micrometers.
The encapsulation layer 40 may be a thin film encapsulation layer. The thin film encapsulation layer includes two inorganic layers and an organic layer between the two inorganic layers. The inorganic layer is formed by chemical sputtering deposition, and the organic layer is formed by coating or the like. The thickness of the thin film encapsulation layer is 3 microns to 10 microns, for example 5 microns, 6 microns or 8 microns. The inorganic layer is made of silicon nitride or silicon oxide, and the organic layer is made of polyimide. The encapsulation layer 40 may also be a glass encapsulation cover plate.
The polarizer 60 is used to reduce the reflectivity of the ambient light in the touch display device, so as to improve the contrast of the touch display device during displaying. The protective cover 70 is used to protect the polarizer 60 and other layers. The protective cover 70 is a transparent polyimide layer, or the protective cover 70 is a glass protective cover.
Referring to fig. 2 to 4, fig. 2 is a schematic diagram of a driving structure of a touch layer of a touch display device according to the present application, fig. 3 is a first schematic diagram of a touch unit shown in fig. 2, and fig. 4 is a schematic diagram of an array arrangement of a plurality of touch units shown in fig. 3.
The touch layer 50 includes a plurality of first touch electrodes 501 electrically connected in a first direction and a plurality of second touch electrodes 502 electrically connected in a second direction, the first touch electrodes 501 are electrically insulated from the second touch electrodes 502, and the first direction is perpendicular to the second direction. The plurality of first touch electrodes 501 electrically connected in a first direction and arranged in the same row form a first touch electrode channel, and a plurality of first touch electrode channels are arranged along a second direction. The plurality of second touch electrodes 502 electrically connected in the second direction and arranged in the same row form a second touch electrode channel, and a plurality of second touch electrode channels are arranged along the first direction.
The size of the touch layer 50 in the first direction is larger than the size of the touch layer 50 in the second direction. The number of first touch electrodes 501 on each first touch electrode channel is greater than the number of second touch electrodes 502 on each second touch electrode channel. The impedance of each first touch electrode channel is greater than the impedance of each second touch electrode channel. Two ends of each first touch electrode channel are connected with the touch chip through a first lead 503, and one end of each second touch electrode channel is connected with the touch chip through a second lead 504. In the embodiment, the touch layer adopts a 2T1R architecture to reduce the load required by the touch chip to drive each first touch electrode channel, thereby effectively increasing the sensing frequency and the touch reporting rate.
As shown in fig. 2 and 4, the touch layer includes a plurality of touch units 505 arranged in an array. Each touch unit 505 is square. As shown in fig. 3, each touch unit 505 includes a first touch electrode 501 and a second touch electrode 502, and the second touch electrode 502 of the same touch unit 505 surrounds the first touch electrode 501.
Fig. 5 is a schematic diagram of a first touch electrode of the touch unit shown in fig. 3. The first touch electrode 501 is disposed along a first direction. The first touch electrode 501 includes a first main electrode 5011 and at least one first branch electrode 5012 disposed along a first direction, and the at least one first branch electrode 5012 is electrically connected to the first main electrode 5011.
One end of the first branch electrode 5012 is electrically connected to the intersection of the first main electrode 5011 and the second main electrode 5021, and an included angle α between the first branch electrode 5012 and the first main electrode 5011 satisfies 0 ° < α <90 °. For example, the included angles α are 30 degrees, 50 degrees, 60 degrees, and 80 degrees. Specifically, the included angle α between the first diverging electrode 5012 and the first trunk electrode 5011 is 45 degrees. Two first branch electrodes 5012 extend from one end of the intersection of the first trunk electrode 5011 and the second trunk electrode 5021, and the two first branch electrodes 5012 are symmetrically arranged with respect to the first trunk electrode 5011.
Each of the first trunk electrodes 5011 includes a plurality of first widened portions 50111 and first connection portions 50112 electrically connected to the first widened portions 50111. The width of the first widened portion 50111 of the first branch electrode 5012 extending from the upper portion of each first trunk electrode 5011 close to the first trunk electrode 5011 is smaller than the width of the first widened portion 50111 of the first branch electrode 5012 extending from the upper portion of the first trunk electrode 5011 so as to adapt to the fact that the distance between the first widened portion 50111 close to the first branch electrode 5012 and the first branch electrode 5012 is smaller than the distance between the first widened portion 50111 away from the first branch electrode 5012 and the first branch electrode 5012, thereby avoiding the problem that the distance between the first branch electrode 5012 and the first trunk electrode 5011 is small, so that the second branch electrode 5022 partially located between the first branch electrode 5012 and the first trunk electrode 5011 is separated from the second branch electrode 5022 partially located between the first branch electrode 5012 and the first branch electrode 5012, and the mutual capacitance between the first touch electrode 501 and the second touch electrode 502 is reduced.
In the present embodiment, each of the second branch electrodes 5022 surrounds one side of the first trunk electrode 5011. The first widened portion 50111 and the second branch electrode 5022 are engaged with each other at a portion corresponding to the first widened portion 50111, and the first connection portion 50112 and the second branch electrode 5022 are engaged with each other at a portion corresponding to the first connection portion 50112, so as to increase a boundary between the first main electrode 5011 and the second branch electrode 5022, thereby further increasing mutual capacitance between the first touch electrode 501 and the second touch electrode 502. The first widening 50111 is diamond shaped. The first stem electrode 5011 is not hollowed, and since the impedance of each first touch electrode channel is determined by the impedance of the first stem electrode 5011 along the longitudinal axis, the impedance of the first touch electrode can be maximally reduced without hollowing in the first stem electrode 5011.
Fig. 6 is a schematic diagram of a second touch electrode of the touch unit shown in fig. 3. The second touch electrode 502 is disposed along a second direction. The second touch electrode 502 includes a second main electrode 5021, at least one second branch electrode 5022, and at least one first connection branch electrode 5023 disposed along a second direction. One end of the second branch electrode 5022 is electrically connected to the second main electrode 5021, two ends of the first connecting branch electrode 5023 are electrically connected to the second branch electrode 5022 and the second main electrode 5021, respectively, and the second branch electrode 5022 surrounds the corresponding first branch electrode 5012.
Compared with the conventional technology, the first connection branch electrode 5023 is additionally arranged between the second branch electrode 5022 and the second main electrode 5021, so that a transmission channel of current on the second touch electrode 502 is increased, and the resistance of the second touch electrode 502 in the touch unit 505 is reduced, so that the resistance of the whole second touch electrode channel is reduced, and the touch report rate is improved.
One end of the second branch electrode 5022 is electrically connected to the intersection of the second main electrode 5021 and the first main electrode 5011, and an included angle β between the second branch electrode 5022 and the second main electrode 5021 satisfies 0 ° < β <90 °, for example, the included angle β is 30 degrees, 40 degrees, 50 degrees, or 80 degrees. Specifically, an included angle between the second branch electrode 5022 and the second main electrode 5021 is 45 degrees.
In the present embodiment, the first diverging electrode 5012 includes a plurality of second widened portions 50121 and second connection portions 50122 electrically connected to the second widened portions 50121, and the second diverging electrode 5022 surrounds the corresponding second widened portions 50121 and second connection portions 50122. The second branch electrode 5022 surrounds the first branch electrode 5012, so that a long boundary is formed between the second branch electrode 5022 and the first branch electrode 5012, mutual capacitance induction between the first branch electrode 5012 and the second branch electrode 5022 is large, mutual capacitance electric field lines are distributed more uniformly, and the resolution and accuracy of a detected touch position are improved.
In the present embodiment, each of the second widened portions 50121 is rectangular in shape. The second widened portions 50121 increase the mutual capacitance between the first branch electrode 5012 and the second branch electrode 5022 more than one second widened portion 50121. The shape of each second widened portion 50121 is rectangular compared to the shape of each second widened portion 50121 being square, so that more second widened portions 50121 can be provided on each first branched electrode 5012, and the mutual capacitance between the first branched electrode 5012 and the second branched electrode 5022 can be increased. The number of the second widened portions 50121 is more than 2, and the first diverging electrode 5012 is provided with the second widened portions 50121 away from the top end of the first trunk electrode 5011. The first diverging electrode 5012 surrounds at least 2 sub-pixels in the width direction of the first diverging electrode 5012.
In the embodiment, the first touch electrodes 501 are symmetrically disposed about the first stem electrode 5011 and the second stem electrode 5021, and the second touch electrodes 502 are symmetrically disposed about the first stem electrode 5011 and the second stem electrode 5021. In the same touch unit 505, the first stem electrodes 5011 at two sides of the intersection of the first stem electrode 5011 and the second stem electrode 5021 are connected through a third connection part 5013, the second stem electrodes 5021 at two sides of the intersection of the first stem electrode 5011 and the second stem electrode 5021 are connected through a fourth connection part 5025, the third connection part 5013 and the first stem electrode 5011 are continuously formed, the fourth connection part 5025 are two connection bridges which are not adjacent to each other, and the third connection part 5013 and the fourth connection part 5025 are insulated from each other.
In the present embodiment, in the same touch unit 505, a first hollow portion 502a is disposed in a first region surrounded by the corresponding first connecting branch electrode 5023, second main electrode 5021 and second branch electrode 5022. The parasitic capacitance between the second touch electrode 502 and the common cathode is reduced by disposing the first hollow portion 502a in the first area. The first hollow portion 502a is triangular. The first hollow portion 502a is disposed along an edge of the second stem electrode 5021 parallel to the second direction.
In this embodiment, the second touch electrodes 502 further include second connection branch electrodes 5024, one end of each second connection branch electrode 5024 is electrically connected to a corresponding second branch electrode 5022, and the other end of each second connection branch electrode 5024 is connected to one end of an adjacent second connection branch electrode 5024 of the adjacent touch units 505 in the second direction, so as to increase a transmission channel of current between two second touch electrodes 502 of the adjacent two touch units 505, reduce impedance of the second touch electrode channel, and improve touch reporting rate.
In the two touch units 505 adjacent to each other in the second direction, the second hollow portion 502b is disposed in a second area surrounded by the second connecting branch electrode 5024 and the second branch electrode 5022, and the parasitic capacitance between the second touch electrode 502 and the common cathode is further reduced by disposing the second hollow portion 502b, so that the influence of the parasitic capacitance on the touch performance is reduced. The second hollow-out portion 502b is a diamond.
In this embodiment, the end of the second branch electrode 5022 away from the connection between the second branch electrode 5022 and the second main electrode 5021 is electrically connected to the end of the corresponding second branch electrode 5022 in the adjacent touch units 505 along the second direction, so that the second branch electrodes 5022 in the two adjacent touch units 505 are continuously conducted, and the resistance of the second touch electrode channel is reduced, thereby increasing the touch reporting rate.
In the present embodiment, in the same touch unit 505, a third hollow portion 502c is disposed in a third region surrounded by the corresponding first connection branch electrode 5023, second connection branch electrode 5024, second main electrode 5021 and second branch electrode 5022, and the third hollow portion 502c is added to further reduce the parasitic capacitance between the second touch electrode 502 and the common cathode.
In the embodiment, the first hollow-out portion 502a, the second hollow-out portion 502b and the third hollow-out portion 502c are spaced from and parallel to each other, so as to reduce the parasitic capacitance of the second touch electrode 502, while the first connection branch electrode 5023 between the first hollow-out portion 502a and the third hollow-out portion 502c is retained and the second connection branch electrode 5024 between the second hollow-out portion 502b and the third hollow-out portion 502c is retained, thereby increasing the distribution area of the branch electrodes of the second touch electrode 502, increasing the uniformity of mutual capacitance distribution during the touch of the first touch electrode 501 and the second touch electrode 502, and avoiding that the area cannot form mutual capacitance due to excessive partial hollow-out. In addition, the first hollow-out portion 502a, the second hollow-out portion 502b, and the third hollow-out portion 502c are located at one side of the first trunk electrode 5021, and the impedance of the second trunk electrode 5021 is increased to affect the touch performance compared to the case where the hollow-out portions are disposed on the second trunk electrode 5021, and the risk of the impedance increase of the second touch electrode channel is avoided while the parasitic capacitance of the second touch electrode 502 is reduced by disposing the hollow-out portions on the local area of the branch electrode of the second touch electrode 502.
In the present embodiment, in a fourth area surrounded by the corresponding second branch electrode 5022 and the first main electrode 5011 of two adjacent touch units 505 along the first direction, a fourth hollow portion 502d is disposed, and a fourth dummy electrode 5064 is disposed in the fourth hollow portion 502d, wherein the fourth dummy electrode 5064 surrounds at least one sub-pixel along the first direction, so as to prevent the second touch electrode 502 from being short-circuited along the first direction.
In the present embodiment, the first virtual electrode 5061, the second virtual electrode 5062, the third virtual electrode 5063, and the fourth virtual electrode 5064 are electrically insulated from the first touch electrode 501 and the second touch electrode 502, the first virtual electrode 5061, the second virtual electrode 5062, the third virtual electrode 5063, the fourth virtual electrode 5064, the first touch electrode 501, and the second touch electrode 502 are all formed by a metal mesh of the same layer, and the first virtual electrode 5061, the second virtual electrode 5062, the third virtual electrode 5063, the fourth virtual electrode 5064 are electrically insulated from the first touch electrode 501 and the second touch electrode 502 by disconnecting the metal mesh. As shown in fig. 7, which is a second schematic view of the touch unit of the present embodiment, the first dummy electrode 5061 is disposed in the first hollow portion 502a, the second dummy electrode 5062 is disposed in the second hollow portion 502b, the third dummy electrode 5063 is disposed in the third hollow portion 502c, and the fourth dummy electrode 5064 is disposed in the fourth hollow portion 502 d. The first dummy electrode 5061, the second dummy electrode 5062, the third dummy electrode 5063, and the fourth dummy electrode 5064 are used to improve optical uniformity of light passing through the touch layer. And the fourth dummy electrode 5064 is used for electrically insulating the second touch electrodes 502 of two adjacent touch units 505 in the first direction.
In this embodiment, one end of the second branch electrode 5022, which is away from the second main electrode 5021, is insulated from one end of the adjacent second branch electrode in the touch unit 505 adjacent to the second branch electrode 5022 along the first direction, so as to prevent the second branch electrode 5022 from being short-circuited in the first direction.
In the present embodiment, the first connection branch electrode 5023 is disposed corresponding to the second widened portion 50121 of the first branch electrode 5012 adjacent to the first connection branch electrode 5023, and the second connection branch electrode 5024 is disposed corresponding to the second widened portion 50121 of the first branch electrode 5012 adjacent to the second connection branch electrode 5024, so that mutual capacitances are formed between the first connection branch electrode 5023 and the corresponding second widened portion 50121 of the first branch electrode 5012, and between the second connection branch electrode 5024 and the corresponding second widened portion 50121 of the first branch electrode 5012.
The first hollow portion 502a is disposed corresponding to the second connection portion 50122 of the adjacent first branch electrode 5012, the third hollow portion 502c is disposed corresponding to the second connection portion 50122 of the adjacent second branch electrode 5012, such that the second branch electrode 5022 forms a mutual capacitance with the second connection portion 50122 corresponding to a portion between the first hollow portion 502a and the second connection portion 50122 of the adjacent first branch electrode 5012, and the second branch electrode 5022 forms a mutual capacitance with the second connection portion 50122 corresponding to a portion between the third hollow portion 502c and the second connection portion 50122 of the adjacent first branch electrode 5012.
The portion of the second branch electrode 5022 corresponding to the first, second and third hollow portions 502a, 502b, 502c and the first branch electrode 5012 surrounds two to three sub-pixels in the width direction of the second branch electrode 5022, and the excess second branch electrode 5022 is removed to reduce the parasitic capacitance of the second touch electrode 502, thereby achieving the balance between the mutual capacitance between the first touch electrode 501 and the second touch electrode 502 and the parasitic capacitance of the second touch electrode 502.
In the present embodiment, the first touch electrode 501 and the second touch electrode 502 are composed of metal grids. The preparation material of the metal grid is at least one of Ti, Al, Mo, Ag and Au. The orthographic projection of the metal grid on the plane of the sub-pixel is positioned at the periphery of the sub-pixel. It is understood that the material for preparing the first touch electrode 501 and the second touch electrode 502 can also be indium tin oxide. When the first touch electrode 501 and the second touch electrode 502 are made of ito, the first touch electrode 501 and the second touch electrode 502 are patterned ito layers.
Fig. 8A is a first schematic diagram of a metal grid surrounding a sub-pixel. The design is suitable for the design that the edges of the sub-pixels are straight lines, for example, the sub-pixels are rectangular, rhombic and the like, and correspondingly, the metal grids are also straight lines. The sub-pixels of the rectangle, the diamond and the like are surrounded by square metal grids, and one metal grid surrounds one sub-pixel. Since the arrangement design of the sub-pixels is a 45-degree inclined design, in order to avoid the shielding of the light emitted by the sub-pixels by the metal grid, the metal wires forming the metal grid also need to be inclined by 45 degrees.
Fig. 8B is a second schematic diagram of a metal grid surrounding a sub-pixel. The design is suitable for the design that the edges of the sub-pixels are arc-shaped, for example, the sub-pixels are oval-shaped, the quadrangle with the sunken arc-shaped edges is a quadrangle, the oval-shaped sub-pixels are surrounded by oval-shaped metal meshes, and the quadrangle with the sunken arc-shaped edges is surrounded by octagonal metal meshes. Four elliptical sub-pixels surround a quadrilateral sub-pixel with inwardly concave arc-shaped edges.
Through simulation, the mutual capacitance of the touch unit formed by the first touch electrode 501 and the second touch electrode 502 applied to the non-foldable touch display device in the embodiment is 0.07 picofarad. Each first touch electrode 501 extends out of the first branch electrode 5012 only at two ends of one end of the first main electrode 5011, so that the touch electrode formed by the first touch electrode 501 and the second touch electrode 502 is more suitable for a touch display device which is not foldable in plane or arc. The touch electrodes extending out of the first branch electrodes from one side of each first main electrode are only suitable for the dynamically foldable screen, and the touch electrodes extending out of the first branch electrodes from one side of each first main electrode are not suitable for the touch display device which is not foldable in plane or radian due to the fact that the thickness of the module of the touch display device which is not foldable is large. In addition, according to the design scheme of the touch control assembly, on the premise of improving the signal quantity during finger touch control, the reduction of the touch screen induction frequency (sensing frequency) caused by insufficient charging of the touch electrode due to overlarge resistance-capacitance Delay (RC Delay) of the touch screen is avoided, and therefore key touch performance indexes such as a point reporting rate are prevented from being influenced.
The above description of the embodiments is only for assisting understanding of the technical solutions and the core ideas thereof; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (16)
1. A touch assembly, comprising a touch layer, the touch layer comprising a plurality of touch units, each of the touch units comprising:
a first touch electrode disposed along a first direction, the first touch electrode comprising: the first branch electrode is arranged along the first direction, and one end of the first branch electrode is electrically connected with the first trunk electrode;
a second touch electrode disposed along a second direction, the second touch electrode comprising: the second branch electrode is arranged along the second direction, one end of the second branch electrode is electrically connected with the second main electrode, two ends of the first branch electrode are respectively electrically connected with the second branch electrode and the second main electrode, the second branch electrode surrounds the corresponding first branch electrode, and the first direction is different from the second direction.
2. The touch-sensing assembly of claim 1, wherein a first hollow portion is disposed in a first region surrounded by the first connecting branch electrode, the second main electrode, and the second branch electrode, and a first dummy electrode is disposed in the first hollow portion.
3. The touch-sensitive assembly of claim 1, wherein the second touch-sensitive electrode further comprises: and one end of each second connection branch electrode is electrically connected with the corresponding second branch electrode, and the other end of each second connection branch electrode is electrically connected with one end of the corresponding second connection branch electrode in the touch unit adjacent to the touch unit along the second direction.
4. The touch-sensing assembly according to claim 3, wherein a second hollow portion is disposed in a second region surrounded by the corresponding second connecting branch electrode and the second branch electrode in two adjacent touch-sensing units along the second direction, and a second dummy electrode is disposed in the second hollow portion.
5. The touch-sensing assembly according to claim 4, wherein the second branch electrode is electrically connected to an end of the corresponding second branch electrode in the touch-sensing unit adjacent to the second direction, away from the end of the second branch electrode connected to the second main electrode.
6. The touch-sensing assembly of claim 3, wherein a third hollow portion is disposed in a third area surrounded by the first connecting branch electrode, the second main electrode, and the second branch electrode, and a third dummy electrode is disposed in the third hollow portion.
7. The touch-control assembly according to claim 1, wherein a fourth hollow portion is disposed in a fourth region surrounded by the corresponding second branch electrode and the first main electrode in two adjacent touch-control units along the first direction, and a fourth dummy electrode is disposed in the fourth hollow portion.
8. The touch-sensing assembly of claim 7, wherein an end of the second branch electrode away from the second main electrode is insulated from an end of an adjacent second branch electrode in the touch-sensing unit adjacent to the second main electrode along the first direction.
9. The touch-sensitive assembly of claim 1, wherein the first stem electrode comprises: a plurality of first widened portions and a first connection portion electrically connected to the first widened portions,
the first diverging electrode includes: a plurality of second widened portions and a second connection portion electrically connected to the second widened portions,
the second branch electrode surrounds the corresponding second widened portion and the second connection portion.
10. The touch assembly of claim 9, wherein the width of the first widened portion of each first branch electrode extending partially closer to the first main electrode is smaller than the width of the first widened portion of each first branch electrode extending partially away from the first main electrode.
11. The touch-sensitive assembly according to claim 9, wherein the first connecting branch electrode is disposed corresponding to the second widened portion of the first branch electrode adjacent to the first connecting branch electrode.
12. Touch control assembly according to claim 1,
one end of the first branch electrode is electrically connected with the intersection of the first main electrode and the second main electrode, and an included angle alpha between the first branch electrode and the first main electrode meets the condition that the included angle alpha is 0 degrees < alpha <90 degrees;
one end of the second branch electrode is electrically connected with the intersection of the second main electrode and the first main electrode, and an included angle beta between the second branch electrode and the second main electrode meets the requirement of 0 degree < beta <90 degrees.
13. The touch-sensitive assembly according to claim 12, wherein the first direction is perpendicular to the second direction, an included angle α between the first branch electrode and the first main electrode is 45 °, and an included angle β between the second branch electrode and the second main electrode is 45 °.
14. The touch-sensitive assembly of claim 1, wherein the first touch-sensitive electrode and the second touch-sensitive electrode are mirror-symmetric with respect to the first main electrode and the second main electrode, respectively.
15. The touch-control assembly according to claim 1, wherein the first trunk electrodes at two sides of the intersection of the first trunk electrode and the second trunk electrode are connected by a third connecting portion;
the second main electrodes positioned at two sides of the intersection of the first main electrode and the second main electrode are connected through a fourth connecting part;
the fourth connecting portion is two unconnected connecting bridges, and the third connecting portion is insulated from the fourth connecting portion.
16. A touch display device, comprising the touch device of any one of claims 1-15 and a display panel, wherein the touch device is located on one side of the display panel, and the display panel comprises an organic light emitting diode array layer and an encapsulation layer, and the encapsulation layer is located between the organic light emitting diode array layer and the touch device.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010677111.1A CN111736736A (en) | 2020-07-14 | 2020-07-14 | Touch control assembly and touch control display device |
| US17/262,707 US20230214069A1 (en) | 2020-07-14 | 2020-08-24 | Touch sensing assembly and touch sensing display device |
| PCT/CN2020/110728 WO2022011784A1 (en) | 2020-07-14 | 2020-08-24 | Touch-control assembly and touch-control display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010677111.1A CN111736736A (en) | 2020-07-14 | 2020-07-14 | Touch control assembly and touch control display device |
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| CN111736736A true CN111736736A (en) | 2020-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010677111.1A Pending CN111736736A (en) | 2020-07-14 | 2020-07-14 | Touch control assembly and touch control display device |
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| Country | Link |
|---|---|
| US (1) | US20230214069A1 (en) |
| CN (1) | CN111736736A (en) |
| WO (1) | WO2022011784A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112732113A (en) * | 2020-12-29 | 2021-04-30 | 合肥维信诺科技有限公司 | Display panel |
| WO2022227448A1 (en) * | 2021-04-29 | 2022-11-03 | 京东方科技集团股份有限公司 | Touch electrode structure, touch panel, and display apparatus |
| WO2023216283A1 (en) * | 2022-05-09 | 2023-11-16 | 武汉华星光电半导体显示技术有限公司 | Touch substrate and display panel |
| WO2023236275A1 (en) * | 2022-06-09 | 2023-12-14 | 武汉华星光电半导体显示技术有限公司 | Touch substrate and display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024052636A1 (en) | 2022-09-09 | 2024-03-14 | Johnson Matthey Davy Technologies Limited | Method for controlling a process comprising a steam system coupled to a reactor system |
| GB202306773D0 (en) | 2023-05-09 | 2023-06-21 | Johnson Matthey Davy Technologies Ltd | Method for controlling a process comprising a steam system coupled to a fischer-tropsch reactor system |
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| US20130127775A1 (en) * | 2011-11-22 | 2013-05-23 | Esat Yilmaz | Single-Layer Touch Sensor with Crossovers |
| CN102662544A (en) * | 2012-03-31 | 2012-09-12 | 苏州瀚瑞微电子有限公司 | Double-layer ITO (indium tin oxide) wire arrangement structure |
| KR102555153B1 (en) * | 2015-12-03 | 2023-07-14 | 삼성디스플레이 주식회사 | Touch panel |
| GB2559569B (en) * | 2017-02-09 | 2020-05-20 | Solomon Systech Ltd | Touch sensor |
| GB2559646A (en) * | 2017-02-09 | 2018-08-15 | Solomon Systech Ltd | Touch Sensor |
| KR102351618B1 (en) * | 2017-08-28 | 2022-01-17 | 삼성디스플레이 주식회사 | Display device |
| WO2019200263A1 (en) * | 2018-04-13 | 2019-10-17 | Tactual Labs Co. | Capacitively coupled conductors |
| CN110737360B (en) * | 2019-09-26 | 2022-05-17 | 武汉华星光电半导体显示技术有限公司 | Touch electrode layer and touch display device |
| CN110989875B (en) * | 2019-11-28 | 2024-04-02 | 京东方科技集团股份有限公司 | Mutual capacitance type touch module and touch panel |
| CN212460535U (en) * | 2020-07-14 | 2021-02-02 | 武汉华星光电半导体显示技术有限公司 | Touch control assembly and touch control display device |
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2020
- 2020-07-14 CN CN202010677111.1A patent/CN111736736A/en active Pending
- 2020-08-24 WO PCT/CN2020/110728 patent/WO2022011784A1/en active Application Filing
- 2020-08-24 US US17/262,707 patent/US20230214069A1/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112732113A (en) * | 2020-12-29 | 2021-04-30 | 合肥维信诺科技有限公司 | Display panel |
| CN112732113B (en) * | 2020-12-29 | 2023-07-28 | 合肥维信诺科技有限公司 | Display panel |
| WO2022227448A1 (en) * | 2021-04-29 | 2022-11-03 | 京东方科技集团股份有限公司 | Touch electrode structure, touch panel, and display apparatus |
| WO2023216283A1 (en) * | 2022-05-09 | 2023-11-16 | 武汉华星光电半导体显示技术有限公司 | Touch substrate and display panel |
| WO2023236275A1 (en) * | 2022-06-09 | 2023-12-14 | 武汉华星光电半导体显示技术有限公司 | Touch substrate and display panel |
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| WO2022011784A1 (en) | 2022-01-20 |
| US20230214069A1 (en) | 2023-07-06 |
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